Quote Originally Posted by Mark O'Neill
...It is an Aussie design , inspired by the Buffel and Kaspir. It can withstand a pretty decent blast directly under the hull, I will not specify it here as I am not sure that the quantity of blast it can resist is unclassified...
It may have been classified in the past, but limited specifics are available on the open 'net. The ability of the hull to withstand blast is given as equivalent to two TM-57 AT mines, or 19kg (not quite 42lb) of TNT.